Web Front-end
JS Tutorial
About the form item verification method in the v-for loop when vue uses the Element component
About the form item verification method in the v-for loop when vue uses the Element component
This article mainly introduces the form item verification method in the v-for loop when Vue uses the Element component. The content is quite good. I will share it with you now and give it as a reference.
The title description looks a bit complicated, with vue, Element, form validation, and v-for loop? Isn’t it a little messy? However, I believe that students who have encountered this problem during development will understand what I mean at a glance.
First of all, the Element component has a complete set of form verification methods. The official document is also very clear: Element form verification API. Normally add rules according to the official document. Set props for the form items that need to be verified, and then submit the form. Just validate the form items through the form's validate method.
But here comes the question. If there are form items dynamically generated through v-for, how to set up validation? This official document does not have a clear explanation. By searching for solutions and actual verification, we summarized the solutions as follows.
The first is the code before looping the form item without verification:
<template>
<p class="content-body">
<el-form ref="form" :model="form" :rules="rules" label-width="120px">
<el-row :gutter="10">
<el-col :span="12" :offset="0">
<el-form-item label="套餐名称：" prop="activityName" id="activityName">
<el-input v-model="form.activityName"></el-input>
</el-form-item>
</el-col>
</el-row>
<el-row :gutter="10">
<el-col :span="12">
<el-form-item label="状态：">
<el-radio v-model="form.status" label="1">上线</el-radio>
<el-radio v-model="form.status" label="0">下线</el-radio>
</el-form-item>
</el-col>
</el-row>
<el-row :gutter="10">
<el-col :span="2" style="width:120px;">
<p class="sub-title">梯度设置：</p>
</el-col>
<el-col :span="20">
<el-row :gutter="10" v-for="(item,index) in form.productGroup" :key="index">
<el-col :span="6">
<el-form-item label="商品数量:">
<el-input v-model="item.num" type="number" size="small" style="width:80px;"></el-input>
</el-form-item>
</el-col>
<el-col :span="6">
<el-form-item label="优惠价格:">
<el-input v-model="item.price" type="number" size="small" style="width:80px;"></el-input>
</el-form-item>
</el-col>
<el-col :span="4">
<i class="el-icon-remove-outline" @click="deleteLadder(index)"></i>
<i class="el-icon-circle-plus-outline" @click="addLadder" v-if="index==0"></i>
</el-col>
</el-row>
</el-col>
</el-row>
<el-form-item size="medium" class="p-submit">
<el-button @click="resetForm('form')">取消</el-button>
<el-button type="primary" @click="submitForm('form')">提交</el-button>
</el-form-item>
</el-form>
</p>
</template>
<script>
/* eslint-disable */
export default {
data() {
return {
form: {
activityName: '',
status: '1',
productGroup: [{num:"",price:""}]
},
rules: {
activityName: [
{ required: true, message: '请输入套餐名称', trigger: 'blur' }
]
}
}
},
methods: {
deleteLadder(index)
{
if(this.form.productGroup.length>1){
this.form.productGroup.splice(index,1);
}
},
addLadder()
{
this.form.productGroup.push({num:"",price:""});
},
submitForm(formName)
{
console.log("activityName...",this.form.activityName);
this.$refs[formName].validate((valid,obj) => {
if (valid) {
this.submitFormAction();
} else {
this.$message.error("验证不通过");
}
});
},
submitFormAction()
{
this.$message.success("提交成功");
},
resetForm(formName)
{
this.$refs[formName].resetFields();
this.form.productGroup = [{num:"",price:""}];
}
}
}
</script>
<style>
.el-form-item {
margin-bottom: 20px;
}
</style>The first is to add rules rules, which is the same as adding normal rules:
productGroupRules: {
productGroupNum: [{required: true, message: '请填写商品数量', trigger: 'blur'}],
productGroupPrice: [{required: true, message: '请填写优惠价格', trigger: 'blur'}]
}Then add validation to the form item, taking the quantity of the product as an example:
<el-form-item label="商品数量:" :prop="'productGroup.'+index+'.num'" :rules="productGroupRules.productGroupNum"> <el-input v-model="item.num" type="number" size="small" style="width:80px;"></el-input> </el-form-item>
Note here:rules must be added for each form item. If there are multiple form items, use the form productGroupRules.productGroupNum to distinguish them, corresponding to the above productGroupRules content.
The other main thing is :prop. Note that the normal verification form item is prop, but here it is :prop. :prop="'productGroup.' index '.num'" is in the form of splicing. The front is the array bound by v-for, the middle is the array index index, and the last is the form item binding. the name of the v-model, and then connect them with dot . All three of these must be guaranteed to be correct, and even one wrong one cannot be verified.
Another thing to note is that the array bound to v-for must also be bound to the form object. Pay attention to the data above:
form: {
activityName: '',
status: '1',
productGroup: [{num:"",price:""}]
}
如果是：
form: {
activityName: '',
status: '1'
},
productGroup: [{num:"",price:""}]cannot be verified, this should also be noted.
Okay, the above is the solution to the form item verification in the v-for loop when vue uses the Element component. I hope it can help students who encounter this problem.
The above is the entire content of this article. I hope it will be helpful to everyone's study. For more related content, please pay attention to the PHP Chinese website!
Related recommendations:
How to use vue's transition to complete the sliding transition
About vue and vue-validator form verification function Implementation
The above is the detailed content of About the form item verification method in the v-for loop when vue uses the Element component. For more information, please follow other related articles on the PHP Chinese website!
Hot AI Tools
Undresser.AI Undress
AI-powered app for creating realistic nude photos
AI Clothes Remover
Online AI tool for removing clothes from photos.
Undress AI Tool
Undress images for free
Clothoff.io
AI clothes remover
Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!
Hot Article
Hot Tools
Notepad++7.3.1
Easy-to-use and free code editor
SublimeText3 Chinese version
Chinese version, very easy to use
Zend Studio 13.0.1
Powerful PHP integrated development environment
Dreamweaver CS6
Visual web development tools
SublimeText3 Mac version
God-level code editing software (SublimeText3)
Hot Topics
How to use bootstrap in vue
Apr 07, 2025 pm 11:33 PM
Using Bootstrap in Vue.js is divided into five steps: Install Bootstrap. Import Bootstrap in main.js. Use the Bootstrap component directly in the template. Optional: Custom style. Optional: Use plug-ins.
How to add functions to buttons for vue
Apr 08, 2025 am 08:51 AM
You can add a function to the Vue button by binding the button in the HTML template to a method. Define the method and write function logic in the Vue instance.
How to use watch in vue
Apr 07, 2025 pm 11:36 PM
The watch option in Vue.js allows developers to listen for changes in specific data. When the data changes, watch triggers a callback function to perform update views or other tasks. Its configuration options include immediate, which specifies whether to execute a callback immediately, and deep, which specifies whether to recursively listen to changes to objects or arrays.
What does vue multi-page development mean?
Apr 07, 2025 pm 11:57 PM
Vue multi-page development is a way to build applications using the Vue.js framework, where the application is divided into separate pages: Code Maintenance: Splitting the application into multiple pages can make the code easier to manage and maintain. Modularity: Each page can be used as a separate module for easy reuse and replacement. Simple routing: Navigation between pages can be managed through simple routing configuration. SEO Optimization: Each page has its own URL, which helps SEO.
How to reference js file with vue.js
Apr 07, 2025 pm 11:27 PM
There are three ways to refer to JS files in Vue.js: directly specify the path using the <script> tag;; dynamic import using the mounted() lifecycle hook; and importing through the Vuex state management library.
How to return to previous page by vue
Apr 07, 2025 pm 11:30 PM
Vue.js has four methods to return to the previous page: $router.go(-1)$router.back() uses <router-link to="/" component window.history.back(), and the method selection depends on the scene.
How to use vue traversal
Apr 07, 2025 pm 11:48 PM
There are three common methods for Vue.js to traverse arrays and objects: the v-for directive is used to traverse each element and render templates; the v-bind directive can be used with v-for to dynamically set attribute values for each element; and the .map method can convert array elements into new arrays.
How to jump to the div of vue
Apr 08, 2025 am 09:18 AM
There are two ways to jump div elements in Vue: use Vue Router and add router-link component. Add the @click event listener and call this.$router.push() method to jump.
